Clamp.



H. v. STEUERNAGEL.

CLAMP. APPLICATION FILED 1AN.20.1916.

Patented Feb.19,1918.

2 SHEETS-SHEET 2.

, l'flvanmr AHUPMQ HUGO V. STEUERNAGEL, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE HUGO Ti/IANU-' FACZ'URING COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF CON- NECTICUT.

CLAMP.

Specification of Letters Patent.

Patented Feb. 19, 1918.

Application filed. January 20, 1916. Serial No. 73,155.

NAGEL, a subject of the Emperor of Ger-- many, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Clamps, of which the following is a specification.

This invention relates to clamps. One of the objects of the invention is the provision of means of a simple and inexpensive nature by which a locker or aw or lockers or jaws movable with a clamping member can be operatively associated with said clamping member. Another object of the invention is the provision of means of an effective character by which such a locker or jaw can be substantially and firmly set. Another object is the provision of means by which a block can be positively prevented from being separated accidentally from the shorter of two rods but which can at will be readily removed from said shorter rod. Another purpose is the provision of means by which rods used for transferring power from a screw to a clamping member can be acted on without undue wear on the rods. The invention comprises other features of novelty and advantage, wh ch with the foregoing will be stated at lengthin the following description wherein I will set forth in detail that form of embodiment of the invention which I have selected for illustration in the drawings accompanying and forming part of the present specification. I do not limit myself to this particular dis- 7 closure; I may deviate therefrom in a number of respects within the scope of the invention defined by the claims following said description.

Referring to said drawings:

Figure 1 is a side elevation, and

Fig. 2 a top plan view of'a clamp involving the invention.

Fig. 3 is a detail view in side elevation of a block with the controlling stop therefor in block releasing position, a part of the supporting rods being shown.

Fig. 4 is a similar view with the block swung back.

Fig. 5 is a longitudinal view partly in elevation of the outer portion of the longer rod, showing thestop in holding position.

Figs. 6 and 7 are cross sections on the line 67 of Fig. 5, showing said stop in its holding and releasing positions respectively.

Fig. 8 is a top plan view partly in section of the clamp.

Fig. 9 is a top plan view of the major part of a clamping member, and

Fig. 10 is a perspective view of a locker or aw.

Fig. 11 is a top plan view partially in section of the adjustable block and its clamping member with the cap of the block removed and showing the jaws, this figure being intended especially to show how said jaws may be dropped into position. I Like characters refer to like parts throughout the several views. For instance, Figs. 1, 2, 3 and 4 are on smaller scales than the other views which in. turn are on different scales somewhat.

an important consideration, nor is theirv form. As a matter of fact as may be gathcred from what I have already said, it is not necessary to use rods as supporting and guiding means in the structure. These rods carry blocks as 4 and 5. As shown the rods extend freely through the block 4 which for said purpose has perforations or holes for the passage of said rods, the former as will be clear being capable of sliding movement on the rods. In the present case the rods have a rigid connection with the block 5, their inner or forward ends being shown as threaded into said block 5 near the opposite ends thereof, the rods as a consequence being removably connected with both blocks.

Cooperative with the block 5 is a clamping memberfi which may as illustrated consist of a plate perforated near its ends tov receive the two supporting and guiding;

25 a mampulatI-ng' screw 11 tothe rods, said clampingmember or plate being therefore, slidable on said rods. The means. for advancing and retracting the] clamping member ,6 may be of any desirable kind, al-

though those shown'andnow to be described are suitable for the purpose. -Extend'ing freely through perforations in the block are push pins 7 of duplicate, construction clamping member 6 and at their rear with a plate 8 which as illustratedconsists-of a disk. These rods or push pins ,7 are opposite eachfo' her and it; therefore, fol-lows 7 that they are connected at their rear or outer 8' may he a rivet tion'with-the 'block5 from Which as will be obvious, said block 'functionsfa's a fixed feed Hut. The cap piece 10 may he provided with handle 12. By turning the right through the action of the handle 12, prov ded the thread of the screw be a right-hand one'as is the case in the organization shown, the screw will be 1 moved to; the right in Figs; 1 and 2 and its Ward thrust to said disk cap piece 10 through the flange 9 acting against the plate or disk 8 will impart a for- I or p'late to thus advance the push pins or rods 7 and hence move the clamping member 6 to the right. 7 The screw 11 has a swive'led connection with the clamping I 'screwfl'l is turned toward the left, the

V will thus impart clamping member '6 wihbe retracted and V I a correspin'ding movement to the rods or push pins 7, so that thedisk or plate 8 Will followv up-the circular flange "9011 such actlon of thescrew '11. Asmay be obvious the thread of'the screw may be either right or left; as illustrated it is of the former type; The parts immediately asmember 6, so that when the connected at their forward ends with the a suitable actuator foradvancing the'push pins or rods 7, but does not apply its effect 1 directly thereto.

7 The adjustable block't provided with 'a clamping member 13 provided'fiwith a "shank 1d the 'block t having a chamber 15 closed at'itsrear end as at 16 to receive for sllding movement said shank 14:. Thelatteriin turn is equipped wlth an extenslon or stud l7' extending freely through a ,plain ho'le' or Eperzfcira-tion in, the wall 16,- the extension or stud ally dec i being fitted with a nut 18 which may as show n by dotted lines engage the adjacent and rear wail ofthe blo'ck 2i to hoid the c'lampingrmember 13 infa' fixed posi-' tion. "The clamping member 13is provided with means inovabletherewith for automati the block 4 er its equivalent to the/supporting and guiding rods 2 and 3 or analogous means, and'one ormore "dogs as will be hereinafter described may" 'beuti lized for "this purpose. These dogs are, movable with the shank ld and on retract i-ve movement of the shank they are automatically 5 cle, intersecting sociated with the clamping member 6 are I 9 r 'i equi .c

7 mentioned these rods acted directly against very much like those shown in Letters Patent No. 1,126,116 g an d. me "January 26; 1-915 and to which reference may be had.

The principal difierencein this particular I between what is shown herein and {what is represented bythe patent is the manner in whichithe push pins 7 receive their advanc-,

ing'thrusts through the operation of a flange In the Letters Patent apart virtually corresponding to the flange,

the consequence being that they dug or bit into the fiangeor operating part. Bycon nes g, them. w th a Plat or bridge r e s Sandhavin'g the latter'take the thrust there no u ndue wear on therods or'pnsh -pins.

This cap piece IOwith -its flanged) presents set.- Forfsecurirrg'the locking action I have shown duplicate dogs1'9 adapted to swing in masses 20 opening into the chamber 15 and through 3 respectively portion '21 adapted to enter a seat as'22in the shank Asshown the seats 22 con:

sist of drilled holes Fof circular form and which cavities'the rods '2 and project. Each of the dogs 19' is provided at its inner-end; with a pivotal preferably a little greater than half a cir the side edges of said shank. Y'Vhile as may be inferred Ldo'not re'strict myself to this type of seat for a pivot p01- ti'on as 21, still it is Ieas'y'onefto form, in that it can be made simply by adrilh In addition to this the seats question present a convenient'way of droppingtlie dogs 19 into place. The, "block 4 as illustrated has an elongated slot 23 extending from, side to side thereof and through which the dogs can'be passedwhen they are to be connected with the clamping member-13 orshank 14 thereof. Inassemblingthe parts the shank v id is introduced into' the chamber 15 from V the open side thereofand theythrea'ded extension or stnd 17-is passed through'thehol'e in the wall 16 themot ion cOn-tinuinguntiL the back partof the shankabuts against the wall 16. This bringsthetwo holes or apertures 22 about central .of the width of the slot which eXtendspractica-I ly from one side to the. other of the block and which int-erse'cts the chambcr'liig. then this abutting relation is present 'thedogs will be passed through the slot 2-3 and their pivot portions 21 will bedropped into thehol es22, the dogs 1 the chamber 15 and their upper and lower 7 facesbeingpracticallyflash with the correj s-ponding surfaces of the shank. After the dogs' are thus positioned-"the slQ-tf23 wi ll be 12.5 bottoming against the under surface of? covered by the cap or plate 24'held in position by lugs 25 and the clamping member 13 will be moved forward to practically its extreme advanced position as shown in Fig. 8 for instance by full lines, thus carrying the dogs 19 therewith so that the rods 2 and 3 can be freely passed through the block 4. The rear walls of the cavities 20 are shown as having cam or wedge faces 26, the tips 27 at the free ends of the dogs being near the entering ends of these cam faces 26 when the clamping member is in its extreme advanced position, so that as the clamping member is retracted and carries the swinging dogs 19 therewith, the tips 27 of the dogs will ride along the cam or wedge surfaces 26 and thus apply to the dogs a powerful thrust to force the same in solid engagement with the respective rods 2 and 3. The dogs 19 are slightly concaved as at 28 and roughened on their operative faces, the concavity or arch agreeing practically with the radius of the respective rods, which in the present instance are cylindrical in cross section. The roughening of the operative portions of the dogs also insures the latter gripping the rods in a thoroughly substantial manner.

The action of the present clamp in a general way is not unlike that shown in the prior Letters Patent to which I have already referred. Initially the adjustable block 4 is moved outward or toward the rear so as to separate the clamping member 13 from the clamping member 6 a distance slightly more than the width of the work which is received between the two rods 2 and 3 or between the two clamping members. In mounting the work it will be clear that the clamping member 13 is in its advanced position. When the work is received between the two clamping members 6 and 13 the manipulating portion 12 is operated to advance the clamping member 6 or move it toward the right in Figs. 1, 2 and 8, thus moving the work and causing the work to retract the clamping member 13, the latter as it is retracted moving the dogs 19 rearward and causing the tips 20 of the dogs to ride along the cam or wedge surfaces 26 and thus to force the dogs into engagement with the rods 2 and 3, the greater the range of movement retractively of the clamping member 13, the greater will be the bite of the dogs on the rods so as to preclude any possibility of movement of the block 4.

For the same purpose as recited in said prior Letters Patent, the rod 2 extends rearwardly of the rod 3 a distance sutficient to permit the block 4 to be disconnected from the rod 3. I provide means such as those now to be described which will permit positively the block from being accidentally separated from the rod 3 but which when desired can be operated to secure such condition. The

longer rod 2 as shown is provided with a stop 29 in the form of a longitudinally split tube embracing and slidable on the extended portion of the rod 2. This stop or tube 29 houses a spring 30 to engage the circumferential portion of the rod 2 to hold said sleeve against accidental turning movement.

Projecting from the rod 2 is a stop 31. In

Figs. 1 and 2 the solid or uncut rear end of the sleeve or tube 29 is against the stop or abutment 31 at the outer or rear end thereof, while the inner end of" the said tube or sleeve is against the block 4 which at this time is connected with the rod 3, the consequence being that the block at this time cannot be slid over on the rear or outer end of said rod 3. To permit the disconnection of the block 4 from said rod 3, the following procedure may be adopted. The sleeve 29 will be turned on the rod 2 to bring its 1ongitudinal slot 32 in register with the shank of the stop or pin 31, so that the stop 27 can then be slid rearward or outward as shown for instance in Fig. 4, the stop 31 traversing the slot 32 on such movement which will continue to an extent sufficient to permit the rearward or outward sliding of the block 4 to carry it free of the rod 3 as shown in Fig. 4 at which point the block 4 can be swung back so that work can be passed into the space between the two rods 2 and 3 at this time not bridged, and when the work is thus received, the parts can be returned to their initial positions as best shown in Fig. 2. The rod 2 may be provided with an abutment as 33 at its extreme rear end which is engaged by the sleeve 29 when the latter is moved to block releasing position. This abutment 33 which may be in the form of an enlargement of the rod 2 prevents the removal of the sleeve from its supporting rod and thus guards against the possibility of its being lost.

What I claim is:

1. The combination of long and short rods, a block carried by the rods for sliding adjustment and provided with clamping means, the extended portion of the long rod being provided with a sleeve and a stud, the sleeve being longitudinally slotted and the stud engaging the solid outer end of the sleeve, the sleeve being turnable on the long rod to bring it into a position where its slot can receive the stud, and means to normally prevent accidental turning movement of the sleeve.

2. The combination of long and short rods, a block carried by the rods for sliding adjustment and provided with clamping means, clampin means cooperative with the other clamping means, the extended portion of the 'a gziins t the blockwhen the same is' o'n the shorter rod, the s'leeve being turnable on the long rod to bring it into impositionwhere its slot can receivesaidstudfwhereby the sleeve can be moved rearwardly "or outwardly to free the block and permit its separation from the shorter rod.

icoples'ot'this patent may be obtained for in presence of two witnesses. v V V 7 HUGO Vf-STEUERNAGEL "-Witnesses: 7 5 L. L. MARKED;

HEATH SUTHERLAND.

In te'sfiinony whereof I affi'x signature v fiv cents each, by adies sing' the commission? of Iatehts; Washington,-D.G. I i 7 

